310842 (2003 AK18)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3842035592 ± 2.00e+00
Semi-major axis (a)0.8769785384 AU ± 3.00e+00
Inclination (i)7.40228421° ± 4.00e+00
Long. of Asc. Node (Ω)301.53854445° ± 5.00e+00
Arg. of Perihelion (ω)23.95386866° ± 6.00e+00
Mean Anomaly (M)64.71175149° ± 8.85e-06
Mean Motion (n)1.2001314814°/day ± 6.16e+00
Perihelion dist (q)0.54004026 AU ± 2.55e+00
Aphelion dist (Q)1.21391681 AU ± 4.51e+00
Orbital Period0.82126525 yr ± 4.21e+00
NGA Modelr2
A2-3.79610414e-06 AU/d²
Physical Parameters
H (abs. magnitude)19.78
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-28
RMS Residual0.315″
Uncertainty0
Orbit TypeAten
MOID0.056304 AU
Observations Used606
Oppositions5
Arc Total2003-2026
First Observation Used2003-01-07
Last Observation Used2026-01-12
Observations (639)
Date Type RA Dec Mag Band Observatory
2003-01-07 09:28:22 C 09 45 20.47 +27 54 37.7 16.2 c 704
2003-01-07 09:50:15 C 09 45 09.71 +27 54 38.3 16.3 c 704
2003-01-07 10:12:56 C 09 44 58.58 +27 54 38.9 16.5 c 704
2003-01-07 10:34:30 C 09 44 47.99 +27 54 38.5 16.2 c 704
2003-01-07 10:56:15 C 09 44 37.30 +27 54 38.3 16.4 c 704
2003-01-08 00:37:54 C 09 38 13.32 +27 53 52.5 d J95
2003-01-08 00:40:09 C 09 38 12.24 +27 53 52.5 d J95
2003-01-08 00:41:24 C 09 38 11.66 +27 53 52.4 d J95
2003-01-08 00:42:40 C 09 38 11.01 +27 53 52.5 d J95
2003-01-08 00:44:04 C 09 38 10.36 +27 53 52.6 d J95
2003-01-08 00:45:39 C 09 38 09.59 +27 53 52.2 d J95
2003-01-08 00:47:39 C 09 38 08.64 +27 53 52.2 d J95
2003-01-08 01:13:33 C 09 37 55.59 +27 53 53.6 d A22
2003-01-08 01:15:24 C 09 37 54.61 +27 53 54.7 d A22
2003-01-08 01:21:35 C 09 37 51.51 +27 53 53.8 d A22
2003-01-08 01:25:36 C 09 37 49.70 +27 53 55.4 d A22
2003-01-08 05:38:43 C 09 35 54.03 +27 53 36.6 c 858
2003-01-08 05:40:26 C 09 35 53.24 +27 53 36.7 c 858
2003-01-08 05:42:12 C 09 35 52.40 +27 53 36.8 c 858
2003-01-08 05:44:00 C 09 35 51.52 +27 53 37.2 c 858
2003-01-08 08:21:04 C 09 34 34.47 +27 53 17.6 i 726
2003-01-08 08:26:05 C 09 34 32.05 +27 53 17.6 i 726
2003-01-08 08:31:05 C 09 34 29.68 +27 53 16.4 i 726
2003-01-08 08:36:04 C 09 34 27.25 +27 53 15.2 i 726
2003-01-08 08:58:25 C 09 34 17.25 +27 53 29.1 16.4 c 704
2003-01-08 09:14:23 C 09 34 09.44 +27 53 27.9 16.5 c 704
2003-01-08 09:19:18 C 09 34 07.04 +27 53 26.9 16.8 c 704
2003-01-08 09:35:57 C 09 33 58.91 +27 53 25.2 16.3 c 704
2003-01-08 09:40:17 C 09 33 56.79 +27 53 24.5 16.6 c 704
2003-01-08 09:56:45 C 09 33 48.75 +27 53 22.4 16.4 c 704
2003-01-08 10:01:44 C 09 33 46.31 +27 53 21.6 16.7 c 704
2003-01-08 10:17:34 C 09 33 38.59 +27 53 19.5 16.3 c 704
2003-01-08 10:23:00 C 09 33 35.94 +27 53 18.5 16.6 c 704
2003-01-08 10:38:17 C 09 33 28.48 +27 53 16.2 16.7 c 704
2003-01-08 12:53:43 C 09 32 30.32 +27 52 40.3 348
2003-01-08 13:02:16 C 09 32 26.29 +27 52 40.0 348
2003-01-08 13:04:22 C 09 32 25.25 +27 52 40.0 348
2003-01-08 13:09:53 C 09 32 22.61 +27 52 40.0 348
2003-01-10 09:02:03 C 09 12 00.79 +27 41 03.0 17.4 c 704
2003-01-10 09:24:58 C 09 11 49.91 +27 40 53.6 17.3 c 704
2003-01-10 09:48:20 C 09 11 38.83 +27 40 43.6 17.1 c 704
2003-01-10 10:14:47 C 09 11 26.27 +27 40 32.1 17.2 c 704
2003-01-10 10:38:22 C 09 11 15.13 +27 40 21.6 17.1 c 704
2003-01-10 11:23:03 C 09 10 54.66 +27 40 03.6 t 644
2003-01-10 11:54:10 C 09 10 40.02 +27 39 49.0 t 644
2003-01-11 03:29:34 C 09 03 38.56 +27 32 41.5 941
2003-01-11 03:30:49 C 09 03 37.98 +27 32 40.8 941
2003-01-11 03:32:05 C 09 03 37.41 +27 32 40.2 941
2003-01-11 03:33:21 C 09 03 36.76 +27 32 39.5 941
2003-01-11 03:35:51 C 09 03 35.69 +27 32 38.1 941
Radar Observations (4)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2011-12-18 14:55:00 141593.549 0.2 Hz 2380 -1 -1
2011-12-18 15:25:00 87814903.72 0.5 us 2380 -1 -1
2011-12-18 15:25:00 140670.6971 0.2 Hz 2380 -1 -1
2011-12-29 03:40:00 -36324.799 4 Hz 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)